货币政策操作规则的转变及启示

美联储在货币政策操作规则上放弃了传统的“相机抉择”及“单一规则”,转而采取兼顾可信度和灵活度的“泰勒规则”。我国应采取既对政策工具有规则约束 ,又对当前或预测的经济状况作出反应的积极货币政策操作规则     

Choosing colleges: Identifying and modeling choice sets

Although largely ignored in the growing literature about college choice that adopts a random utility modeling framework, there is reason to believe that the estimates are sensitive to the criteria used to define the choice sets. Accordingly, this paper examines the methodological and substantive implications of using merit (class rank) and socioeconomic (high school strata) to define college choice sets. Using Texas as a case study, results show that criteria used to constrain choice sets—and type of high school attend in particular—not only produce quite different post-secondary institutional profiles, but also different estimates of institutional attributes on students’ top choice. These findings have methodological implications for future research about college choice and substantive importance for the prospects that the Texas top 10% law, which guarantees automatic admission to students who graduate in the top decile of their high school class, will equalize access to the state’s competitive public institutions.     

计算机汉字库结构及其读写研究

本文研究汉字在计算机汉字库中的存储方式，并由此出发，探讨对汉字库的读写方法。本方法可应用于分析计算机汉字库的结构。向汉字库中写入新字，以及建筑自己的小型汉字库。     

基于压缩感知的智能天线DO A估计算法

波达方向（direction of arrival,DOA）估计是利用具有一定空间结构的天线阵元对空间信源的来波方向进行估计。为解决MUSIC算法和ESPRIT算法在智能天线DOA估计中空间谱分辨率和抗噪声性能方面的不足,依据压缩感知理论的贪婪算法思想,将匹配追踪（matching pursuit,MP）算法和子空间追踪（subspace pursuit,SP）算法应用在DOA估计中,即提出2种新的算法MP-DOA和SP-DOA。这2种算法主要包括原子库建立、信号投影、最佳匹配原子筛选及信号特征提取等过程。4种算法的仿真实验与对比分析结果表明,MP-DOA算法在低信噪比情况下较其他3种算法性能更优越,SP-DOA算法在角度分辨率和对信源数的包容方面的性能较其他3种算法优越,也验证了应用压缩感知理论的优越性。     

关于随机误差标准差的几点思考

从多种角度加深理解标准差的含义,有助于应用.用不同的代号表示贝塞尔公式和标准差的定义式不够妥当.     

Effectiveness of random payment in Experiments: A meta-Analysis of dictator games

Monetary incentives remain an integral component of economics experiments. However, the experimental economics literature is inconclusive when it comes to the effectiveness of random payment mechanisms, specifically in non-strategic individual decision experiments. To contribute to the literature on incentives in experiments, this study performed a meta-analysis of 94 dictator game studies and examined the effect of two frequently used random payment mechanisms on behavior. The mechanisms analyzed were the random problem selection procedure (RPSP) and between-subject random incentivized system (BRIS). The meta-analysis showed that RPSP and BRIS did not significantly alter behavior when compared to a single incentivized decision and incentivizing all subjects, respectively. The results support the effectiveness of RPSP and BRIS in nonstrategic individual decision experiments.